In the simplest cases, potentially yes. I think there was one suggestion on one of the dmarc lists of having an encoded diff result in a header, allowing you to reverse it.
It doesn't help as much for removals, especially lists that remove entire attachments or parts. I mean, you could still encode a diff, but that mostly defeats the purpose of making those changes in the first place. It also means that you're not validating what's in those areas, which can be especially problemmatic for html, where positioning tags and such can cause whatever's there to overwrite the body during display. Brandon On Thu, Jun 16, 2016 at 10:33 AM, Jim Popovitch <[email protected]> wrote: > Hello! > > If Mailman (and other MLMs) would provide some header data that listed > msg modifications (i.e. pre-pended subject with 6 chars, post-pended > body with 6 lines, etc), would this be beneficial for anyone to use in > order to reconstruct an original msg and validate the original DKIM > sig (X-Google-DKIM-Signature, etc.) ? > > -Jim P. > > _______________________________________________ > mailop mailing list > [email protected] > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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